I'm using it to develop www.trebel.la, which will hopefully be out on the App Store this fall. But it also has a pretty unconventional (game-like) UI. IMO, if I wanted to build something that was well served by standard Android or iOS widgets, I would just write native apps. Kivy will never look or feel just like a native app, but since it has evolved from a game engine, it's a great choice for apps like mine that are part game, part standard UI.